Law enforcement personnel continue to investigate the scene Tuesday morning Feb. 5, 2013 in Midland City, Ala., where the hostage crisis ended on Monday afternoon. The young boy involved in the crisis was rescued and the gunmanwas killed. (AP Photo/Dothan Eagle, Jay Hare) TV OUT MAGS OUT

Law enforcement personnel continue to investigate the scene Tuesday morning Feb. 5, 2013 in Midland City, Ala., where the hostage crisis ended on Monday afternoon. The young boy involved in the crisis was

Dale County Elelmentary School Principal Phillip Parker,center, talks about the child in his school known as Ethan that was rescued on Monday after being held hostage for a week during a press conference on Tuesday morning Feb. 5, 2012, in Midland City, Ala. Joining him ares Dale County School Superintendant Donnie Bynum, right, and Alabama Department of Education Transportation Director Joe Lightsey. (AP Photo/Dothan Eagle, Jay Hare) MAGS OUT TV OUT

Dale County Elelmentary School Principal Phillip Parker,center, talks about the child in his school known as Ethan that was rescued on Monday after being held hostage for a week during a press conference on

ADDS ATTRIBUTION FOR CHILD'S NAME -- Dale County Elelmentary School Principal Phillip Parker,center, talks about the child in his school that authorities have indentified as only Ethan who was rescued on Monday after being held hostage for a week during a press conference on Tuesday morning Feb. 5, 2012, in Midland City, Ala. Joining him ares Dale County School Superintendant Donnie Bynum, right, and Alabama Department of Education Transportation Director Joe Lightsey. (AP Photo/Dothan Eagle, Jay Hare) MAGS OUT TV OUT

ADDS ATTRIBUTION FOR CHILD'S NAME -- Dale County Elelmentary School Principal Phillip Parker,center, talks about the child in his school that authorities have indentified as only Ethan who was rescued on

ADDS ATTRIBUTION FOR CHILD'S NAME -- Dale County Elelmentary School Principal Phillip Parker,center, talks about the child in his school that authorities have indentified as only Ethan who was rescued on Monday after being held hostage for a week during a press conference on Tuesday morning Feb. 5, 2012, in Midland City, Ala. Joining him ares Dale County School Superintendant Donnie Bynum, right, and Alabama Department of Education Transportation Director Joe Lightsey. (AP Photo/Dothan Eagle, Jay Hare) MAGS OUT TV OUT

ADDS ATTRIBUTION FOR CHILD'S NAME -- Dale County Elelmentary School Principal Phillip Parker,center, talks about the child in his school that authorities have indentified as only Ethan who was rescued on

MIDLAND CITY, Ala. - The Alabama man who held a 5-year-old boy captive for nearly a week engaged in a firefight with SWAT agents storming his underground bunker before he was killed during the rescue operation, the FBI said Tuesday night. Also, bomb technicians scouring his rural property found two explosive devices, one in the bunker, one in a plastic pipe that negotiators used to communicate with the man.

Officers killed 65-year-old Jimmy Lee Dykes Monday, said an official in Midland City, speaking on condition of anonymity. The bunker raid came six days after Dykes boarded a school bus, fatally shot the driver and abducted the boy, who by all accounts was unharmed.

Dykes "reinforced the bunker against any attempted entry by law enforcement," FBI Special Agent Jason Pack said in an email. The devices found were "disrupted," Pack said, though he did not say whether that meant they were detonated or disarmed. Officers will continue Wednesday to sweep the 100-acre property, Pack said.

Surveillance used

For days, officers passed food, medicine, toys and other items into the bunker, which apparently had running water, heat and cable television.

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On Monday, authorities said, Dykes had a gun and appeared increasingly agitated, though it's unclear exactly how his behavior changed. Negotiations - the details of which have not been made public - were deteriorating. The Midland City official said law enforcement agents had been viewing Dykes with some sort of camera, which is how they saw that he had a gun.

Pack declined to get into specifics, but confirmed that high-tech surveillance equipment was used during the police standoff.

Agents stormed the bunker, whisking the boy to safety and leaving Dykes dead. The official who confirmed that officers had killed Dykes and the use of the camera cited discussions with law enforcement and requested anonymity.

Neighbors said they heard what sounded like explosions and gunshots, though the FBI and local authorities would not confirm if explosives detonated.

No officers or agents were injured, Pack sad.

By all accounts, despite his ordeal, the 5-year-old on Tuesday appeared to be acting like a normal kid, people around him say. He was running around, playing with a toy dinosaur and other action figures, eating a turkey sandwich and watching "SpongeBob SquarePants," relatives and Dale County Sheriff Wally Olson said.

'My sweet boy'

"We know he's OK physically, but we don't know how he is mentally," said Betty Jean Ransbottom, the boy's grandmother. She added that she feared the ordeal would stay with the child, who turns 6 on Wednesday, the rest of his life.

Law enforcement officials have only identified the boy by his first name, Ethan.

The boy's mother, in a statement released by authorities, expressed her thanks for all the hard work of so many officers to bring her son home.

"For the first time in almost a week, I woke up this morning to the most beautiful sight … my sweet boy," she said. "I can't describe how incredible it is to hold him again."

Dale County Coroner Woodrow Hilboldt said Tuesday that he had not been able to confirm exactly how Dykes died because the man's body remained in the bunker.

It also wasn't clear how authorities knew Dykes was armed, or what kind of surveillance they used to track his movement.

At the request of lawmen, Secretary of Defense Leon Panetta had approved the provision of certain equipment that could be employed to assist in the hostage situation, according to a U.S. official who requested anonymity. It is not clear whether the equipment was actually used.